CN112026731A - Full-vehicle braking system of electric tractor - Google Patents
Full-vehicle braking system of electric tractor Download PDFInfo
- Publication number
- CN112026731A CN112026731A CN202010808574.7A CN202010808574A CN112026731A CN 112026731 A CN112026731 A CN 112026731A CN 202010808574 A CN202010808574 A CN 202010808574A CN 112026731 A CN112026731 A CN 112026731A
- Authority
- CN
- China
- Prior art keywords
- brake
- assembly
- braking
- pipe
- steel pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
- B60T13/46—Vacuum systems
- B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/02—Arrangements of pumps or compressors, or control devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/04—Arrangements of piping, valves in the piping, e.g. cut-off valves, couplings or air hoses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/04—Arrangements of piping, valves in the piping, e.g. cut-off valves, couplings or air hoses
- B60T17/043—Brake line couplings, air hoses and stopcocks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/04—Arrangements of piping, valves in the piping, e.g. cut-off valves, couplings or air hoses
- B60T17/046—Devices for pipe guiding and fixing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention discloses a full-vehicle braking system of an electric tractor, which is characterized by comprising a suspension foot braking device, a driving steering full-wheel braking device, a full-vehicle braking synchronous linkage system, a braking pipeline with a damping structure, a steering soft connection structure and a reverse connection braking current feedback system, wherein the suspension foot braking device comprises a foot braking assembly and a vacuum booster, the driving steering full-wheel braking device comprises two steering wheel brakes and two driving wheel brakes, the full-vehicle braking synchronous linkage system comprises a six-way valve, a braking air pipe I, a braking air pipe II, a herringbone three-way joint, a braking air pipe III, more than two electric vacuum pumps and a vacuum tank assembly, the braking air pipe I is connected with the vacuum booster, the six-way valve is connected with the braking pipeline with the damping structure, and the braking pressure of front and rear wheels is distributed according to a set power proportion. The invention realizes the driving steering all-wheel braking through the control foot braking suspension device and meets the braking safety requirement under the condition of light weight.
Description
Technical Field
The invention relates to the technical field of electric tractors, in particular to a full-vehicle braking system of an electric tractor.
Background
The electric tractor mainly adopts a mode of towing a freight train, and when the electric tractor works, the train is braked by the brake wheel of the tractor in most cases, so that the grade of climbing the freight train is limited within a range. If the train climbs on the unsafe slope, the train is easy to get out of the human control when going downhill or stopping by accident, and then the train is folded to wash down the slope. The driving accidents happen many times, and the consequences are very serious! Is the first problem of using the battery tractor.
For the electric tractor, the energy consumption can be further saved by light weight design as far as possible under the condition of meeting the technical conditions of rated traction force and the like; the braking safety requirement provides enough braking wheel load, and the current light and medium-load electric tractor adopts the driving wheel to brake while the steering wheel does not contain brake.
Due to the difference of different customer service environments, the requirement of meeting the braking requirement of a full load ramp needs to sacrifice the energy consumption requirement under the condition of meeting the braking requirement of a flat road, or the performance parameters such as the working condition requirement of the whole vehicle or the rated cargo capacity under the condition of reducing environmental factors are improved, so that the adaptability of the product is reduced and certain potential safety hazards exist.
Disclosure of Invention
The invention aims to provide a whole-vehicle braking system of an electric tractor, which realizes the driving steering all-wheel braking by operating a foot braking suspension device and meets the braking safety requirement under the condition of light weight.
Therefore, the invention provides a whole-vehicle braking system of an electric tractor, which is characterized by comprising a suspension foot braking device, a driving steering whole-wheel braking device, a whole-vehicle braking synchronous linkage system, a braking pipeline with a damping structure, a steering soft connection structure and a reverse connection braking current feedback system, the suspension foot braking device comprises a foot braking assembly and a vacuum booster, the driving steering all-wheel braking device comprises two steering wheel brakes and two driving wheel brakes, the whole vehicle braking synchronous linkage system comprises a six-way valve, a braking air pipe I, a braking air pipe II, a herringbone three-way joint, a braking air pipe III, more than two electric vacuum pumps and a vacuum tank assembly, wherein the braking air pipe I is connected with the vacuum booster, the six-way valve is connected with a brake pipeline with a damping structure, and the brake pressure of the front wheel and the brake pressure of the rear wheel are distributed according to a set power proportion.
Compared with the prior art, the present invention has the following technical advantages/beneficial effects.
1. When the system is applied to electric traction of various light and medium cargo loads, sufficient braking force is provided, the braking requirement of a train without braking under a load state is met, and the safety of a tractor, the train and cargos is guaranteed.
2. When the system works, the reliability and the safety of the system work are ensured through the self damping structure, the reverse connection braking current feedback system and the safety pressure feedback system, the rationality and the effectiveness of the system work are ensured through the synchronous linkage system, the soft connection structure and the driving steering all-wheel braking, and the controllability and the convenience of the system work are ensured through the foot braking device.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a whole-vehicle braking system of an electric tractor according to the present invention;
FIG. 2 is a partial schematic structural diagram of the whole braking system of the electric tractor according to the present invention;
FIG. 3 is a schematic structural diagram of a six-way valve of the whole braking system of the electric tractor according to the invention;
FIG. 4 is a schematic view of a reverse braking current feedback system of the whole braking system of the electric tractor according to the present invention; and
fig. 5 is a schematic diagram of the safety pressure feedback system of the present invention.
Description of the reference numerals
11. A foot brake assembly, 12, a vacuum booster;
21. the device comprises a six-way valve 22, brake air pipes I and 23, brake air pipes II and 24, a herringbone three-way joint 25, brake air pipes III and 26, an electric vacuum pump 27, a vacuum tank assembly 28, a vacuum tank bracket 29 and a vacuum pump bracket;
31. (AP) pipe clamps, 32, brake steel pipe III assemblies, 33, brake steel pipe IV assemblies, 34, brake steel pipe V assemblies, 35, wire harness fixing clamps, 36, brake steel pipe VIII assemblies, 37, brake steel pipe IX assemblies, 38 and brake steel pipe X assemblies;
41. the brake pipe assembly comprises a brake rubber pipe bracket 42, a brake steel pipe I assembly 43, a front rubber pipe assembly 44, a brake steel pipe II assembly 45, a rear rubber pipe assembly 46, a brake steel pipe VI assembly 47, a two-way joint 48 and a brake steel pipe VII assembly;
51. foot brake switch 52, driving motor 53, brake sensor 54, walking controller.
61. A friction plate sensor 62, a brake oil can 63, a brake fluid level sensor 64, a brake front disc support 65, a vacuum tank pressure alarm 66, a complete machine controller 67 and a wire harness;
71. steering wheel brake, 72, driving wheel brake.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1-5 illustrate some embodiments according to the invention.
The invention realizes the driving steering all-wheel braking by operating the foot braking suspension device, meets the braking safety requirement under the condition of light weight, and solves the problems in the prior art.
As shown in fig. 1 and fig. 2, the whole-vehicle braking system of the electric tractor comprises a suspension foot braking device, a whole-vehicle braking synchronous linkage system, a braking pipeline with a damping structure, a steering soft connection structure, a reverse connection braking current feedback system, a safety pressure feedback system and a driving steering whole-wheel braking device.
The suspension foot brake device is used to provide braking demand and transmit braking action through manual operation, and comprises a foot brake assembly 11 and a vacuum booster 12. The foot brake assembly 11 is fixed on the whole vehicle body.
The vacuum booster 12 is connected to the foot brake assembly 11. The vacuum booster 12 includes a master cylinder that provides dual braking circuits.
The foot brake assembly 11 provides braking demand to transmit braking action through manual operation, and controls the starting of the whole system. The vacuum booster 12 assists the manual operation, so that the operator can complete the operation in the full stroke range with a simpler action, thereby effectively realizing the ideal braking action and achieving the expected braking effect.
The whole vehicle brake synchronous linkage system is used for solving the problems of brake failure and the like caused by uneven states and inconsistent actions of a complex load state and a multi-wheel brake pressure system, and comprises a six-way valve 21, a brake air pipe I22, a brake air pipe II 23, a herringbone three-way joint 24, two brake air pipes III 25, an electric vacuum pump 26, a vacuum tank assembly 27, a vacuum tank support 28 and a vacuum pump support 29.
Wherein, the six-way valve 21, the herringbone three-way joint 24, the vacuum pump bracket 29 and the vacuum tank bracket 28 are fixed on the whole vehicle body. The electric vacuum pump 26 is fixed to a vacuum pump bracket 29. The vacuum tank assembly 27 is secured to a vacuum tank support 28.
Wherein, vacuum tank assembly 27 is connected with vacuum booster 12 through braking trachea I22, is connected with electric vacuum pump 26 through braking trachea II 23, braking trachea III 25.
The electric vacuum pump 26 provides the original vacuum pressure. The chevron fitting 24 combines the vacuum pressures generated by the two electric vacuum pumps 26.
The vacuum tank assembly 27 stores vacuum pressure for later use, providing the required vacuum pressure upon receipt of a braking action request.
The six-way valve 21 distributes the braking pressure of the front wheel and the rear wheel according to the braking force proportion, and the balance of the braking force and the consistency of the braking effect are realized.
Referring collectively to FIG. 3, the six-way valve is a variable pressure ratio six-way valve. The oil-saving device comprises two oil inlets P1 and P2, and four oil outlets A1, A2, B1 and B2. Wherein, A1, B1 are P1 side oil outlets, A2, B2 are P2 side oil outlets, two ways of oil work independently, mutual noninterference, arbitrary one way appears leaking or other trouble, another way still can normally work, is not influenced.
The six-way valve and the vehicle body brake are connected in sequence: the port A1 is connected with the right rear driving wheel, the port A2 is connected with the left rear driving wheel, the port B1 is connected with the left front steering wheel, and the port B2 is connected with the right front steering wheel.
The maximum allowable working pressure of the system is 10 MPA. Under different system pressures, input and output characteristic curves of pressure of an oil inlet (input) and pressure of a pressure outlet (output) on the same side follow different slopes, and under a conventional working condition, when the pressure P of a master pump output system is less than or equal to 2.7MPA, the brake pressure input by the oil inlet is the oil outlet output pressure, namely P1 is A1 is B1, and P2 is A2 is B2; under the emergency braking working condition, when the pressure of a master pump output system is not less than 2.7MPA and not more than 10MPA, the (output pressure-2.7)/(input pressure-2.7) is 1:4, namely A1 is B1 is 1/4(P1-2.7) + 2.7; a2 ═ B2 ═ 1/4(P2-2.7) + 2.7.
In addition, regarding the flow rate, a 1: b1 ═ 2:1, a 2: b2 is 2:1, that is, the output flow rates of the main output oil port (supplying oil to the driving wheel) and the secondary output oil port (supplying oil to the steering wheel) of the one-side cavity of the six-way valve are 2:1, the tractor driving wheel meets the characteristics of large load and large required braking force. This is true for both single sided chambers of the six-way valve.
The brake pipeline with the damping structure is used for preventing vibration and resonance caused by overlong route, non-uniform speed change of the whole vehicle motion state and bumpy road condition in the power transmission process of the system, and comprises A Plurality of (AP) pipe clamps 31, a brake steel pipe III assembly 32, a brake steel pipe IV assembly 33, a brake steel pipe V assembly 34, a brake steel pipe VIII assembly 36, a brake steel pipe IX assembly 37, a brake steel pipe X assembly 38 and two wiring harness fixing clamps 35.
And the brake steel pipe III assembly 32 is fixed on the whole vehicle body through An (AP) pipe clamp 31 and is connected with the six-way valve 21. The braking steel pipe IV assembly 33 and the braking steel pipe V assembly 34 are fixed on the whole vehicle body through An (AP) pipe clamp 31 and connected with the six-way valve 21. The braking steel pipe VIII assembly 36 is fixed on the whole vehicle body through An (AP) pipe clamp 31 and is connected with the six-way valve 21.
The brake steel pipe IX assembly 37 is fixed on the whole vehicle body through a wire harness fixing clamp 35, and the six-way valve 21 is connected with a brake master cylinder of the vacuum booster 12 through the brake steel pipe IX assembly 37 and the brake steel pipe X assembly 38.
The brake steel pipes forming power transmission are uniformly fixed on the whole vehicle body at a certain interval through An (AP) pipe clamp and a six-way valve and a vacuum tank assembly which are fixed on the whole vehicle body, so that vibration and resonance caused by overlong route, non-uniform speed change of the whole vehicle motion state and bumpy and fluctuant road conditions in the system power transmission process are prevented, and the normal work of a brake pipeline system with a damping structure is ensured.
The steering flexible connection structure is used for adapting to the fact that a brake steel pipe rotates along with the steering of a steering wheel, and brake failure caused by air leakage, liquid leakage and system brake pressure reduction due to loosening of a connector is avoided, and comprises two brake rubber pipe supports 41, a brake steel pipe I assembly 42, a front rubber pipe assembly 43, a brake steel pipe II assembly 44, a rear rubber pipe assembly 45, a brake steel pipe VI assembly 46, a two-way connector 47 and a brake steel pipe VII assembly 48.
The brake steel pipe I assembly 42 is connected with a front rubber pipe assembly 43 and is fixed on a brake rubber pipe bracket 41; the other end of the front rubber pipe assembly 43 is connected with a braking steel pipe VIII assembly 36.
The brake steel pipe II assembly 44 is connected with another front rubber pipe assembly 43 and fixed on another brake rubber pipe bracket 41; the other end of the front rubber pipe assembly 43 is connected with the brake steel pipe III assembly 32.
The brake steel pipe VI assembly 46 is connected with a rear rubber pipe assembly 45 and is fixed on the brake rubber pipe bracket 41; the other end of the right rear rubber pipe assembly 45 is connected with the brake steel pipe V assembly 34.
One end of the two-way joint 47 is connected with the braking steel pipe IV assembly 33, and the other end of the two-way joint is connected with the braking steel pipe VII assembly 48; the brake steel pipe VII assembly 48 is fixed on the brake rubber pipe bracket 41 and is connected with the other end of the rear rubber pipe assembly 45 at the left rear side.
The front rubber tube assembly 43 is a flexible transition piece, a brake steel tube I assembly 42 and a brake steel tube II assembly 44 which are connected with one end of the front rubber tube assembly are fixed on the brake rubber tube bracket 41, and a brake steel tube III assembly 32 and a brake steel tube VIII assembly 36 which are connected with the other end of the front rubber tube assembly are arched and rotate along with the steering wheel, so that the brake failure caused by air leakage, liquid leakage and reduced system brake pressure due to loosening of a joint is avoided, namely, the brake system is ensured to adapt to different action requirements by providing a steering soft connection structure.
The reverse brake current feedback system is used to generate a retarding reaction torque for the drive motor through information transfer and program control, as shown in fig. 4, and includes a foot brake switch 51 and/or brake sensor 53, a drive motor 52, and a travel controller 54.
The foot brake switch 51 and/or the brake sensor 53 are fixed to the foot brake assembly 11, and the contacts thereof are interlocked with the actuating member of the foot brake assembly 11.
The driving motor 52, the foot brake switch 51 and/or the brake sensor 53 are electrically connected to the travel controller 54 through a wire harness.
When the foot brake assembly 11 acts, the foot brake switch 51 and/or the brake sensor 53 collects the action of the foot brake switch 51 and transmits an analog quantity signal to the walking controller, and the walking controller reversely connects a phase sequence to the driving motor, so that the driving motor generates reverse torque with a retardation effect, and the function of reversely connecting a brake current feedback system is realized.
The safety pressure feedback system is equipped with sensors at various possible failure points and processed by the vehicle controller, as shown in fig. 5, and comprises four friction plate sensors 61, a brake fluid level sensor 63, a vacuum tank pressure alarm 65 and a vehicle controller 66.
The friction plate sensor 61 is fixed on the brake front disc support, and the brake fluid level sensor 63 and the vacuum tank pressure alarm 65 are fixed on the vacuum tank. The brake fluid level sensor 63 is used to detect the fluid level in the brake fluid reservoir 62 on the brake master cylinder of the vacuum booster 12.
The friction plate sensor 61, the brake fluid level sensor 63 and the vacuum tank pressure alarm 65 are electrically connected with the complete machine controller 66 through a wire harness.
When the complete machine controller 66 detects fault information of any one of the friction plate sensor 61, the brake fluid level sensor 63 and the vacuum tank pressure alarm 65, the complete machine controller 66 transmits a signal to the driving motor 52 to control the driving motor 52 to rotate and stop.
The driving steering all-wheel brake device realizes the final coordination of two pairs of braking actions with different loads and different braking force requirements, and comprises two steering wheel brakes 71 and two driving wheel brakes 72. The steering wheel brake 71 and the driving wheel brake 72 are final actuators for achieving braking of the whole vehicle.
The steering wheel brake 71 is connected with a braking system through a brake steel pipe I assembly 42 and a brake steel pipe II assembly 44, and the driving wheel brake 72 is connected with the braking system through a brake steel pipe VI assembly 46, so that final braking action is realized.
The steering wheel brake 71 and the driving wheel brake 72 realize the synchronization of braking actions through a whole vehicle brake synchronous linkage system.
The steering wheel brake 71 and the driving wheel brake 72 provide the original signal of the safety pressure feedback system 6 through the friction plate sensor 61, and the safety protection function is realized.
When the invention is applied to electric traction of various light and medium cargo loads, enough braking force is provided, the braking requirement of a train without braking under a load state is met, and the safety of a tractor, the train and cargos is ensured; when the system works, the reliability and the safety of the system work are ensured through the self damping structure, the reverse connection braking current feedback system and the safety pressure feedback system, the reasonability and the effectiveness of the system work are ensured through the synchronous linkage system, the soft connection structure and the driving steering all-wheel braking, and the controllability and the convenience of the system work are ensured through the foot braking device.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A whole-vehicle braking system of an electric tractor is characterized by comprising a suspension foot braking device, a driving steering whole-wheel braking device, a whole-vehicle braking synchronous linkage system, a braking pipeline with a damping structure, a steering soft connection structure and a reverse connection braking current feedback system,
the suspension foot braking device comprises a foot braking assembly (11) and a vacuum booster (12), the driving steering all-wheel braking device comprises two steering wheel brakes (71) and two driving wheel brakes (72),
the whole vehicle braking synchronous linkage system comprises a six-way valve (21), a braking air pipe I (22), a braking air pipe II (23), a herringbone three-way joint (24), a braking air pipe III (25), more than two electric vacuum pumps (26) and a vacuum tank assembly (27),
the vacuum tank assembly (27) is connected with the vacuum booster through the brake air pipe I (22), the six-way valve is connected with a brake pipeline with a damping structure, and brake pressures of front wheels and rear wheels are distributed according to a set power proportion.
2. The full-vehicle brake system of the electric tractor according to claim 1, wherein the brake pipeline (3) with the shock absorption structure comprises a pipe clamp (31), a brake steel pipe III assembly (32), a brake steel pipe IV assembly (33), a brake steel pipe V assembly (34), a wire harness fixing clamp (35), a brake steel pipe VIII assembly (36), a brake steel pipe IX assembly (37) and a brake steel pipe X assembly (38),
the brake steel pipe III assembly (32) is fixed on the whole vehicle body through the pipe clamp (31) and is connected with the six-way valve (21),
the brake steel pipe IV assembly (33) and the brake steel pipe V assembly (34) are fixed on the whole vehicle body through the pipe clamp (31) and connected with the six-way valve (21),
the braking steel pipe VIII assembly (36) is fixed on the whole vehicle body through the pipe clamp (31) and is connected with the six-way valve (21),
the brake steel pipe IX assembly (37) and the brake steel pipe X assembly (38) are fixed on the whole vehicle body through the wire harness fixing clamp (35) and are connected with a brake master cylinder of the vacuum booster (12).
3. The whole-vehicle brake system of the electric tractor according to claim 1, wherein the steering flexible connection structure (4) comprises a brake rubber tube bracket (41), a brake steel tube I assembly (42), a front rubber tube assembly (43), a brake steel tube II assembly (44), a rear rubber tube assembly (45), a brake steel tube VI assembly (46), a two-way joint (47) and a brake steel tube VII assembly (48),
the first ends of the two front rubber pipe assemblies (43) are fixed through a brake rubber pipe bracket (41) and are connected with the brake steel pipe I assembly (42), the second ends of the two front rubber pipe assemblies are fixed ends, wherein the second end of one front rubber pipe assembly (43) is connected with the brake steel pipe VIII assembly (36), the second end of the other front rubber pipe assembly (43) is connected with the brake steel pipe III assembly (32),
the first ends of the two rear rubber tube assemblies (45) are fixed through a brake rubber tube support (41) and are connected with the brake steel tube VI assembly (46), the second end of the brake steel tube VI assembly is a movable end, the second end of one rear rubber tube assembly (45) is connected with the brake steel tube VII assembly (48), the brake steel tube VII assembly (48) is connected with the brake steel tube IV assembly (33) through a two-way joint (47), and the second end of the other rear rubber tube assembly (45) is connected with the brake steel tube V assembly (34).
4. The brake system of the whole electric tractor according to claim 1, further comprising a safety pressure feedback system for monitoring a failure point of the brake system, and comprising a plurality of friction plate sensors (61) electrically connected with a complete machine controller (66), a brake fluid level sensor (63), and a vacuum tank pressure detector (65) with an alarm function, wherein the friction plate sensors (61) are distributed on two steering wheel brakes (71) and two driving wheel brakes (72), and the brake fluid level sensor (63) is distributed on a brake oil pot of the vacuum booster (12).
5. The brake system of the electric tractor according to claim 1, wherein the reverse connection brake current feedback system comprises a foot brake switch (51) and/or a brake sensor (53), wherein the foot brake switch (51) and/or the brake sensor (53) is fixed on a foot brake assembly (11) and used for collecting an action signal of the foot brake assembly (11) when the foot brake assembly (11) is actuated and transmitting the action signal to a walking controller (54) of the electric tractor, and the walking controller (54) provides a reverse connection phase sequence to each driving motor (52) of the electric tractor according to the action signal, so that the driving motor (52) is braked in a reverse connection mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010808574.7A CN112026731B (en) | 2020-08-12 | 2020-08-12 | Full-vehicle braking system of electric tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010808574.7A CN112026731B (en) | 2020-08-12 | 2020-08-12 | Full-vehicle braking system of electric tractor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112026731A true CN112026731A (en) | 2020-12-04 |
| CN112026731B CN112026731B (en) | 2023-09-29 |
Family
ID=73576945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010808574.7A Active CN112026731B (en) | 2020-08-12 | 2020-08-12 | Full-vehicle braking system of electric tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112026731B (en) |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08169325A (en) * | 1994-12-20 | 1996-07-02 | Mitsubishi Motors Corp | Integrated control device for trailer brake force |
| JPH1044958A (en) * | 1996-07-31 | 1998-02-17 | Jidosha Kiki Co Ltd | Anti-skid brake control system |
| EP1174320A2 (en) * | 2000-07-21 | 2002-01-23 | NEW HOLLAND ITALIA S.p.A. | Brake assembly for vehicle |
| CN1931642A (en) * | 2006-10-13 | 2007-03-21 | 吉林大学 | Pneumatically braking anti-lock brake system for mixed powered automobile |
| CN201472355U (en) * | 2009-06-09 | 2010-05-19 | 厦门永裕机械工业有限公司 | Automotive brake with pressure adjustment function |
| CN201872741U (en) * | 2010-11-01 | 2011-06-22 | 王军 | Hydraulic control type automobile auxiliary brake apparatus used for ABS (Anti-skid Brake System) |
| CN203766748U (en) * | 2014-04-16 | 2014-08-13 | 吉林大学 | Hydraulic device for recovering automobile braking energy |
| CN203854653U (en) * | 2013-12-31 | 2014-10-01 | 深圳市陆地方舟新能源电动车集团有限公司 | Automobile braking system and electric truck |
| CN104875732A (en) * | 2015-05-28 | 2015-09-02 | 江苏大学 | Brake control system and method for semi-trailer train |
| CN105035051A (en) * | 2015-08-27 | 2015-11-11 | 安徽江淮汽车股份有限公司 | Hydraulic auxiliary braking system |
| CN105235665A (en) * | 2015-10-26 | 2016-01-13 | 江苏理工学院 | Full-hydraulic double-loop dynamic braking system |
| CN105523032A (en) * | 2016-02-26 | 2016-04-27 | 成都雅骏新能源汽车科技股份有限公司 | Electric motorcar vacuum boost control system and control method thereof |
| CN105539411A (en) * | 2015-12-30 | 2016-05-04 | 江苏靖江叉车有限公司 | Vacuum boosting and induction type regenerative dual brake system of electric tractor |
| CN106494258A (en) * | 2016-09-18 | 2017-03-15 | 东风襄阳旅行车有限公司 | Electric automobile vacuum servo and motor composite braking system and brake control method |
| CN206187002U (en) * | 2016-11-25 | 2017-05-24 | 北京新能源汽车股份有限公司 | Electric automobile braking system and electric automobile |
| CN108827656A (en) * | 2018-08-01 | 2018-11-16 | 北京长城华冠汽车技术开发有限公司 | A kind of tooling measuring braking system performance for simulating whole vehicle state |
| CN208325204U (en) * | 2018-06-05 | 2019-01-04 | 安徽合力股份有限公司 | A kind of fork truck brake pipe installation assembly |
-
2020
- 2020-08-12 CN CN202010808574.7A patent/CN112026731B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08169325A (en) * | 1994-12-20 | 1996-07-02 | Mitsubishi Motors Corp | Integrated control device for trailer brake force |
| JPH1044958A (en) * | 1996-07-31 | 1998-02-17 | Jidosha Kiki Co Ltd | Anti-skid brake control system |
| EP1174320A2 (en) * | 2000-07-21 | 2002-01-23 | NEW HOLLAND ITALIA S.p.A. | Brake assembly for vehicle |
| CN1931642A (en) * | 2006-10-13 | 2007-03-21 | 吉林大学 | Pneumatically braking anti-lock brake system for mixed powered automobile |
| CN201472355U (en) * | 2009-06-09 | 2010-05-19 | 厦门永裕机械工业有限公司 | Automotive brake with pressure adjustment function |
| CN201872741U (en) * | 2010-11-01 | 2011-06-22 | 王军 | Hydraulic control type automobile auxiliary brake apparatus used for ABS (Anti-skid Brake System) |
| CN203854653U (en) * | 2013-12-31 | 2014-10-01 | 深圳市陆地方舟新能源电动车集团有限公司 | Automobile braking system and electric truck |
| CN203766748U (en) * | 2014-04-16 | 2014-08-13 | 吉林大学 | Hydraulic device for recovering automobile braking energy |
| CN104875732A (en) * | 2015-05-28 | 2015-09-02 | 江苏大学 | Brake control system and method for semi-trailer train |
| CN105035051A (en) * | 2015-08-27 | 2015-11-11 | 安徽江淮汽车股份有限公司 | Hydraulic auxiliary braking system |
| CN105235665A (en) * | 2015-10-26 | 2016-01-13 | 江苏理工学院 | Full-hydraulic double-loop dynamic braking system |
| CN105539411A (en) * | 2015-12-30 | 2016-05-04 | 江苏靖江叉车有限公司 | Vacuum boosting and induction type regenerative dual brake system of electric tractor |
| CN105523032A (en) * | 2016-02-26 | 2016-04-27 | 成都雅骏新能源汽车科技股份有限公司 | Electric motorcar vacuum boost control system and control method thereof |
| CN106494258A (en) * | 2016-09-18 | 2017-03-15 | 东风襄阳旅行车有限公司 | Electric automobile vacuum servo and motor composite braking system and brake control method |
| CN206187002U (en) * | 2016-11-25 | 2017-05-24 | 北京新能源汽车股份有限公司 | Electric automobile braking system and electric automobile |
| CN208325204U (en) * | 2018-06-05 | 2019-01-04 | 安徽合力股份有限公司 | A kind of fork truck brake pipe installation assembly |
| CN108827656A (en) * | 2018-08-01 | 2018-11-16 | 北京长城华冠汽车技术开发有限公司 | A kind of tooling measuring braking system performance for simulating whole vehicle state |
Non-Patent Citations (1)
| Title |
|---|
| 日本自动车技术会: "《汽车工程手册5底盘设计篇》", 31 December 2010, 北京理工大学出版社, pages: 182 - 183 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112026731B (en) | 2023-09-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103097214B (en) | Hydraulic brake system and its operating method | |
| CN102216134B (en) | Service brake control system for optimized regenerative braking of medium or heavy trucks | |
| CN111971214A (en) | Hydraulic motor vehicle braking system and method for operating same | |
| CN109941253B (en) | Double-loop autonomous braking system with failure redundancy function and braking method | |
| JP2011521843A (en) | Automotive brake device with accumulator | |
| CN109733351A (en) | Electric brake system and braking method | |
| CN113071466A (en) | Multifunctional shuttle valve type dual-motor redundant braking system and control method | |
| CN109733352A (en) | Electric brake system and braking method | |
| CN105579303A (en) | Brake device and use of a direction control valve in a brake device | |
| CN107985082B (en) | Electro-hydraulic braking method for dumper | |
| CN201872741U (en) | Hydraulic control type automobile auxiliary brake apparatus used for ABS (Anti-skid Brake System) | |
| CN113002508A (en) | Dual-motor redundant braking system with integrated pressure regulating unit and control method | |
| CN112026731A (en) | Full-vehicle braking system of electric tractor | |
| CN102167024A (en) | Hydraulic brake system and method for running the same | |
| CN101811466B (en) | Control system of engineering bridge transport vehicle | |
| CN203381616U (en) | Hydraulic brake control device applied to brake energy recovery | |
| CN115973118A (en) | Full hydraulic brake control system for bidirectional driving trackless rubber-tyred vehicle | |
| CN216374511U (en) | Commercial vehicle braking system and commercial vehicle | |
| CN108891395A (en) | A kind of vehicle and its front and back wheel brake force distribution system | |
| CN210852417U (en) | P-gear locking control system based on front wheel braking and automobile with same | |
| CN212289794U (en) | Distributed brake system with manpower failure backup and axle pressure equalization functions | |
| CN202271982U (en) | Antilock system and car | |
| CN102745185B (en) | Brake device for car | |
| CN208360154U (en) | A kind of automatic emergency air braking systems | |
| CN105235665A (en) | Full-hydraulic double-loop dynamic braking system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 230000 Shanghai Road (formerly Jingwu Road), Baohe Industrial Zone, Baohe District, Hefei City, Anhui Province (Jianghuai heavy industry base) Applicant after: Anhui Jianghuai Heavy Construction Machinery Co.,Ltd. Address before: 230000 Shanghai Road (formerly Jingwu Road), Baohe Industrial Zone, Baohe District, Hefei City, Anhui Province (Jianghuai heavy industry base) Applicant before: JAC HEAVY-DUTY CONSTRUCTION MACHINE Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |